Glazing bar



J. VWILLIAMIS Aug. 29, 1939.

GLAZING BAR.

Filed Aug. 12, 1938 Patented Aug. 29, 1939 UNITED STATES PATENT OFFICE Application August 12, 1938, Serial No. 224,597 In Great Britain August 2'7, 1937 3 Claims.

This invention relates to glazing bars of the kind comprising a main part or web having projecting laterally therefrom a longitudinally extending abutment on which one face of the glass bears and with which it is held in engagement by a resilient clamping bar which extends in a generally inclined direction from a point where it engages the web into contact with the other face of the glass.

For the sake of convenience the edge of the clamping bar which engages the web and lies remote from the glass will be referred to as the inner edge.

One example of such a glazing bar is described in the specification of the present applicants United States of America Patent No. 2,114,791 and the object of the present invention is to provide an improved glazing bar of this general kind.

To this end in a glazing bar of the kind re ferred to according to the present invention the web is provided with a part or parts adapted to beengaged by the inner edge portion of the clamping bar when in position, these parts and the clamping bar being so formed that when so engaged the parts exert a force on the inner edge portion of the clamping bar preventing bodily movement thereof away from the glass and tending to move the glass-engaging part of the clamping bar inwards towards the web into engagement with the face of the glass.

In aconvenient arrangement the web is provided with a, slot or groove the opening of which is directed towards the face of the glass and the inner edge portion of the clamping bar is adapted to be inserted into this groove or recess, whereupon the reaction between this edge portion of the clamping bar and th= sides of the grooveon the one hand and between the glassengaging part of the .bar and the adjacent face of the glass on the other hand is such that the clamping bar is flexed and thus bears resiliently on the adjacent face of the glass.

In such a construction the groove may be formed in various ways but in a'convenient arrangement the groove is formed in a rib-like projection extending longitudinally of the web, or is formed between such a rib-like projection and the web. In any case it will be appreciated that the groove must be of appreciable depth in order to react on the inner edge portion of the clamping bar in the desired manner.

- The clamping bar may be formed in various ways but'in one arrangement it is formed not only with a part which slopes from the inner edge portion away from the web to the point where-it engages the glass but also with a part which extends from such point inwards towards the web along'the face of the glass and preferably beyond the edge thereof and. is pressed by the resilience of the bar towards the glass. This part which extends along the face of the glass may be curved or otherwise formed so that its inner edge portion which extends beyond the edge of the glass projects through the plane of the adjacent face of the glass and thus tends to assist in drawing the glass-engaging part of the clamping bar inwards towards the web or preventing the outward movement of this part of the clamping bar under forces applied to the glass.

Where the inneredge portion of the clamping bar is located in a' groove as above described, this groove may either haveparallel sides or be otherwise'formed. Thus, for example, the inner portion of the groove may be wider than the outer part through which the clamping bar projects, or vice versa.

In any case, it will be understood that the groove must have sufficientdepth to receivej'the required widthof the edge portionoftheclamp-j ing bar toenable the sides of the groove to produce the necessary reaction thereo'nl' In an alternative arrangement, the extreme inner edge of the clamping bar may rest against an abutment which prevents outward. movement of this edge away from the glass while the outer face of a part of the bar spaced bya small dis-' tance from this extreme inner edge is acted upon by a rib or bead formed or mounted on the web so as to produce the necessary reaction to maintain the glass-engaging part of the clamping bar in engagement with the glass. 5 The invention may be carried" into practice invarious' ways but a number of constructions according to the invention are illustrated by way of example in the accompanying drawing, in which I V Figure 1 is a cross-section showing one cone struction according to the invention, and

Figures 2, 3, 4 and 5 are similar views to Fig-1 ure 1 of four alternative constructions according,

to the invention.

In the construction shown in Figure 1 the glazing bar comprises a main portion or web A from one edge portion of which-extend laterally two flange-like parts A each forked to provide a riblike part A constituting an abutment against whichone face of a sheet of glass B can lie'and. a second rib-like part A constituting a protecting flange so dimensioned as to leave a space between its edge and the glass.

Formed respectively in opposite sides of the web, for example in rib-like lateral projections A integral with the web, are grooves C, these grooves lying at an angle to the plane of the web. Each groove C is adapted to receive the inner edge portion of a resilient clamping bar D so formed that when in position, as shown, it extends from its groove away from the web in a generally inclined direction towards the glass. The arrangement is such that the part of the edge of the clamping bar which lies nearer the base of the groove C bears against the inner side of the groove, that is to say the side adjacent to the web, while the part of the edge of the clamping bar which lies nearer the mouth of the groove bears against the outer side of the groove so that the clamping bar is somewhat flexed by the reaction produced on the inner edge portion thereof by the sides of the groove, which reaction thus maintains the clamping bar in close contact with the glass. This reaction conveniently has components both towards the face of the glass and inwards towards the web, and the clamping bar may be formed so as to bear on the glass at a point beyond the abutment A as shown, or immediately opposite this abutment or in some cases even inside this abutment.

As will be seen each clamping bar has a part D which extends inwards along the face of the glass from its outermost portion towards the web to a point beyond the edge of the glass, this part D being conveniently bent or curved so that where it extends beyond the edge of the glass, it also extends: through the plane of the adjacent face thereof. In this way the part D may assist in tending to draw the adjacent part of the clamping bar towards the web or preventing the outward displacement of this part of the clamping bar.

In the alternative construction shown in Figure 2, the general form and operation of the abutments A A and of the clamping bars D, D is the same as in the construction shown in Figure 1 but, instead of grooves C being formed in lateral projections A grooves C are formed in a bead or rib A formed along the opposite edge of the bar from the parts A A A Figure 3 shows a modification of the construction shown in Figure 2 having grooves C the sides of which are inclined to the plane of the web A;

In the modification shown in Figure 4, the general arrangement and operation is the same as that shown in Figure 2 but instead of a rib A containing the grooves and formed integral with the web A, grooves C to receive the inner edge portions of the clamping bars are formed between the sides of the adjacent edge portion of the web and a separate capping piece C secured to the edge of the web, for example by screws C Figure 5 shows an arrangement generally similar to Figure 4 but with grooves C formed between the sides of the web A and parts of a capping piece C secured for example by welding to the edge of the web.

It is to be understood that the constructions described above are given by way of example only and that the form of the web and of the clamping bars and the manner in which the grooves to receive and act on the inner edge portions of the clamping bars are formed may vary considerably without departing from this invention.

What I claim as my invention and desire to secure by Letters Patent is:

l. A glazing bar comprising a main member including a web having projecting laterally therefrom a longitudinally extending abutment adapted to be engaged by the lower face of a sheet of glass, a resilient clamping bar having an inner edge portion adjacent to a part of the web lying above the glass and a part extending from this inner edge portion towards and into contact with the upper face of the glass, a longitudinally extend-- ing narrow groove formed by parts rigid with the part of the web which lies above the glass and directed inwardly towards the upper face of the sheet of glass, the inner edge portion of the clamping bar being adapted to engage the groove and cooperate therewith to be bent inwardly towards the web whereby the reaction between the inner edge portion of the clamping bar and the inwardly directed face of the groove causes the part of the clamping bar lying between its upper edge and the point where it engages the glass to flex so that by reason of the resilience of the bar the part engaging the glass always tends to move inwards towards the web, said clamping bar bcing formed not only with a part which slopes from its upper inner edge portion away from the web to the point where it engages the glass but also with a lower part which extends from such point inwards towards the web along the face of the glass and beyond the edge thereof, said bar being pressed by its resiliency to wards the glass and is so formed that its edge portion extending towards the web beyond the edge of the glass projects through the plane of the adjacent face of the glass and tends to assist in drawing towards the web the part of the clamping bar which engages the glass.

2. A glazing bar comprising a main member including a web having projecting laterally therefrom a longitudinally extending abutment adapted to be engagedby the lowerface of a sheet of glass, and a resilient clamping bar the upper inner edge portion of which lies adjacent to a part of the web lying above the glass while a lower part extends from this inner edge portion towards and into contact with the outer face of the glass, a longitudinally extending groove being formed in a rib-like projection extending longitudinally of the web and directed towards the upper face of the sheet of glass, the upper inner edge portion of the clamping bar being adapted to engage the outer wall of said groove and be bent inwardly towards the web and so cooperating therewith that the reaction between this inwardly bent edge portion of the clamping bar and the sides of the groove is such that the part of the clamping bar lying between its upper edge and the point where it engages the glass is flexed whereby, and due to the resiliency of the bar, the part engaging the glass always tends to move inwards towards the web.

3. A glazing bar comprising a main member including a web having projecting laterally therefrom a longitudinally extending abutment adapted to be engaged by the lower face of a sheet of glass, and a resilient clamping bar an upper inner edge portion of which lies adjacent to a part of the web lying above the plane of the sheet of glass while a lower part extends from this inner edge portion towards and into contact with the upper face of the glass, a longitudinally extending parallel-sided narrow groove formed by parts rigid with the part of the web which lies above the glass with the sides of the groove inclined to the plane of the Web so that the open end of the groove lies nearer the plane of the web than does the base of the groove, the inner edge portion of the clamping bar being adapted to fit within the groove and so cooperate therewith that the reaction between this upper inner edge portion of the clamping bar and the sides of the groove is such that the part of the clamping bar lying between its upper edge and the point where it engages the glass is flexed so that, by reason of the resiliency of the bar, the part engaging the glass always tends to move inwards towards the web.

JACK WILLIAMS. 

